Stenciling machine



Aug. 24, 1926.

E. G. ROWLEY STENCILING MACHINE Original Fi led June 24, 1924 Patented Aug. 24, 1926.

UNITED STATES nnwann e. ROWLEY, or BELLEVILLE, nnw mnsnr, assxenon r0 un'mmwoon ma PATENT OFFICE.

WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

STENCILING macrmm. a v

Original application filed June 24, 1924, Serial No. 721,982. l livitleo. and thil application Med December a, 1925. Serial Nth-74,279.

Thisinvention relates to duplicating ma-' chines, in which a perforated drum or cylinder is covered with an. ink-blanket,- saturated-with ink applied to the interior of the cylinder and overlaid with e a. stencil, between which and the pressure-roll the paper to be stenciled is passed.

A- feature of the present invention is the provision of means for securely attaching the ink-blanket to the cylinder. This means may include a pair of rods to which the ends of the ink-blanket are secured. The rods are placed in a channel formed in the cylinder. and are held therein by projections on the end walls of the channel.

Another feature of the invention is the provision of a cover for closing the opening of the channel. The cover is so constructed that when it is in place its outer surface conforms with the periphery of the drum, so

as not to impair its cylindricity. For attaching the cover to the drum, the former is provided at one end with an out-turned edge which engages with a rigid lug on one of the end walls of the channeL- At the other end the cover is held in position by means of a latch or bolt, which co-operates with arigid lug on the wall at the end of the channel, the bolt being operable through an opening in the cover when the latter is to be removed.

This application is a'division of my copending application, Serial No. 721,982, filed June 24, 1924.

Other features and advantages'will hereinafter appean H a In the accompanying drawings,

Figure 1 is a front-elevaticnal view of an embodiment of the invention, parts. being broken away to show the construction.

Figure 2 is a fragmentary longitudinal sectional view of the stencil cylinder taken on line 2-2 of- Figure .1 and drawn to an enlargediscale. L,

Figure 3 is a transverse sectional view taken on line 3-3 of Figure 1, with the cylinder revolved one-quarter of a turn, the' supports for thecylinder being shown in dot-and-dash lines, and parts are broken away to disclose structural features.

Figure 4 is a fragmentary transverse sectional view taken through the blanket securing channel and illustrating the manner of its assembly. a Y

In the embodiment shown, the machine will be seen' to comprise a supportframe consisting of front and rear base bars (not shown) rigidly connected withv upright sides 16 and 17 respectively, at the right and left hand side of the machine The raised portions of the frame side 17 converge to a central boss 19, bored to receive a fixed plug 20 on which is revolubly mounted a cylinder, generally designated by the numeral 21, .in such manner as to be readily removed. -The right-hand side frame 16 has diverging U-shaped upper ele-.

ments on which are mounted revoluble trundles or rolls 22, engaging the cylinder 21 on opposite sides above its center. 1

The cylinder is open at the end carried'in the trundles, and fixed in the other end is a spoked' head 26, having a hub 27, containing an annular groove in which is received the end, of a spring-aetuated detent 28, mounted on a pivot 29 extending between lugs raised from the boss 19, so that, when the outer end of the detent is depressed. the hub 27 will be free to move off the stud, permitting the cylinder to be drawn outwardly from between the trundles, clear of the machine.

At the outer, opposite end of the cylinder is a rigid, annular head 30, increased in diameter to present a ring 31, on which the ,trundles 22 bear, and near the outer edge provided a bracket 34, aving an extending handle 35, which is held to the end of the cylinder head by radially extending lugs (not shown) integral with the ends of the bracket, the inner portions .of the lugs engaging in the groove 32, and a single central clip 38, secured to the bracket by a. screw, engages the inner groove 33.

A gib plate 40 is disposed between the main portion of the bracket 34 and the end surface of the cylinder, the plate having a liner 40 of fiber or like material to contact with the cylinder end when forced ,thereagainst by clamp screws 41, having knurled heads for convenience in hand operating, the points of the screws impinging on the plate 40, clampingthe bracket at any polnt along its circumference.

The main-body of the cylinder consists of a sheet-metal plate 52, attached to the inner reduced portions of the heads 26 and 30, respectively, by screws 53, and is provlded with a plurality of perforations 54 throughout its entire area. The reduced portions of the heads contain openings arranged in alignment and in which is secured a sheetmetalchannel 55, over the side walls 56 of which, the ends 57 of the perforated plate 52 are secured, these ends reaching to the bottom of the channel.

0 Fixed in the ends of the channel, to the.

mreaching annular rim members 58 and 59 of theheads 26 and respectively, are

fianged to'fit within-'the'sides of the chair-- plates 60, secured in opposed relation by screws 61 and having, at their centers, openings 62-above which the metal is bulged, to present inreaching lugs 63 to engage a channel cover plate 64.

The coverplate 64 is curved transversely in conformity with the radius of the cylinder and is supported by posts 65 riveted into the channel bottom. v.

The edges of the cover 64 are downnels and one end is sheared and formed to present a clip 66, having an out-turned lower edge 66 to engage below one of the lugs 63'.

Near the other end of the cover, on its inner side, are secured inreaching lugs 67, spacedand perforated to act as guides for a sliding bolt 68, carrying a transverse pin 69 against 'which one end of an encircling compression spring 70 abuts, the other end of the spring being seated against the mating lug 67, the action of the spring being to press the beveled end of the bolt into the opening below the lug 63 to .be held by it; the opposite end of the boltv68 is bent upwardly, forming a I retracting the bolt.

fingeriece 71, projecting into an opening 72 in t e cover, this opening being of ample size to permit the entrance of a finger in Also formed on the plates 66, at'. their ends, are inreaching projections 74 relatively short and narrow to engage over the ends of rods 75 to which are attached the ends. of

an ink-blanket 76. It will he understood that the length of the blanket is such as topass from one side of the channel ever and around the perforated cylinder to the other side, and that it is capable of beingstretched by swinging the rods under the projections'74, which hold them in place below the cover.

v A roll 77 of soft elastic nature, mounted on a shaft 78, is held in contact with'the cylof a channel having walls extending rigidly between the heads, a plate attached to each head within the channel at its ends, said plates having openings and integral lugs over the openings, a cover for the channel to rest on the edges of the plates, a catch on the cover to engage below one of the lugs, and a spring-actuated snap bolt carried by the cover to eng ge under the other lug, said cover having an opening through which the bolt may be retracted.

- .2. In a duplicating machine stencil cylinder, thecombination with av pair of heads and a perforated body-portion therebetween, of a channel having walls extending rigid] between the heads, a plate attached to eac head within he channel at its ends, said plates. having openings andintegral lugs over the openings, a cover for the'channel to cover to engage below one of the lugs, a

- rest on the edges of the plates, a catch on the springimpelled snap bolt carried by the cover to engage the other lug,- there being an opening in the cover'into which a part' of the bolt extends to facilitate retraction, and. posts set in the bottom of the channel'to' conact .wih the lower surface'of the cover when engaged over the channel.

3. In a duplicating machine stenciljcylinand a perforated body-portion therebetween, of a channel having. walls extendin rigidly between the heads, a plate attache to each head within the channel at its ends, said plates having openings and integral lugs 9 der, the combination with a pair of heads over the openings, a cover for the channel to rest on the edges of the plates, a catch on the cover to engage below oneofthe lugs, aspiring-impelled snap bolt carried by the cover to engage the other lug, therebeing an opening in the cover into which apart of the bolt extends to' facilitate retraction, a pair of inkblanket rods disposable in the channel from opposite sides thereof, and inreaching extensions formed on said plates to engage over the ends of said rods.

4%. In a dnphcatmg'machine, the combination with an impression roll, apair of cylinder-heads and a perforated body-portion therebetween, of a channel having walls ex-- tending between the heads, plates attached to the heads within the channel at its ends, saidplates having openings and lugs over vthe openings, a cover for closing theopening of the channel the periphery of the cover conforming with the contour of the cy1inder to com lete the same and form a surface upon whic said roll may run, and means 5 at the ends of the cover to engage the, lugs for securing the cover in itio 5. In a duplicating mac 'ne, the combinetion with an impresslon roll, a air of cylinder-heads and a perforated y-portion therebetween, of a channel having walls extendin between the'heads, plates attached to the ends within the channel at its ends,

upon whic said the o em a cover for closing-the opening 0 the c nnel the periphery of the cover conformin with the contour of the cy1inplates having openings and lugs oven der to com lete'the same and form a surface I EDWARD G. RdwLEY.

at the; ends 

